hardware_list = ['键盘','笔记本电脑','鼠标']
print(hardware_list)

hardware_list.append('人体工学椅')
print(hardware_list)

hardware_list.remove('键盘')
print(hardware_list)

print(hardware_list[2])
print(max(hardware_list))

price_list = [41,589,23,56,12,20]
print(max(price_list))
print(min(price_list))
print(sorted(price_list))  #######sorted
print(len(price_list))

